关键词: 不锈钢棒材, 数值模拟, 装炉系数, 温度场

Abstract: For three different cross sections of stainless steel bars(square, round and hexagonal) under vacuum furnace thermal radiation conditions, finite element simulation combined with heat transfer principles was used to construct a standard sample library by using the "equivalent circular bar diameter comparison method". A study was conducted on the determination method of charging coefficient, and mathematical models were established for the loading spacing and charging coefficient of heat treatment in different fields. The results show that as the loading distance increases, the adjacent diameters, conditional thicknesses and charging coefficients of the three different shapes of stainless steel bars gradually decrease. Comparing the charging coefficient, it can be found that the charging coefficients of tightly arranged round stainless steel bars and hexagonal stainless steel bars are significantly smaller than that of the square stainless steel bars. In the actual production of stainless steel bars, under the condition of strictly following the provisions of the charging coefficient and calculating the correct conditional thickness, the bars can be arranged tightly without leaving gaps during furnace charging.

Key words: stainless steel bars, numerical simulation, charging coefficient, temperature field